<template>
  <div class="todo-footer">
    <label>
      <input type="checkbox" v-model="isCheckAll" />
    </label>
    <span>
      <span>已完成{{complateNum }}</span> / 全部{{todoList.length }}
    </span>
    <button class="btn btn-danger" @click="deleteAllComplate">清除已完成任务</button>
  </div>
</template>

<script lang="ts">
import { defineComponent } from "vue";

export default defineComponent({
  name: "Footer",
});

</script>

<script lang="ts" setup>
import { computed } from "vue";
import type { TodosType } from "../../App.vue";

interface PropsData {
  todoList: TodosType;
  updateAll: Function;
  deleteAllComplate: Function
}
const props = defineProps<PropsData>();
// 计算已完成数量
const complateNum = computed(() => {
  return props.todoList.reduce((p, c) => (c.done ? p + 1 : p), 0)
})
// 全选计算属性
const isCheckAll = computed({
  set(value: boolean) {
    props.updateAll(value);
  },
  get() {
    return complateNum.value === props.todoList.length;
  },
  
})



</script>

<style scoped>
/*footer*/
.todo-footer {
  height: 40px;
  line-height: 40px;
  padding-left: 6px;
  margin-top: 5px;
}

.todo-footer label {
  display: inline-block;
  margin-right: 20px;
  cursor: pointer;
}

.todo-footer label input {
  position: relative;
  top: -1px;
  vertical-align: middle;
  margin-right: 5px;
}

.todo-footer button {
  float: right;
  margin-top: 5px;
}
</style>